<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>字符串的方法</title>
</head>
<body>
  <script>
     const str="hello world"
    //  console.log(str.length)
    //  const arr=str.split("")
    //  console.log(arr)
    console.log(str.substring(6));
  </script>
</body>
</html>